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J. L. WEBSTER.

FUEL SAVER AND SMOKE CONSUMER.

APPLICATION FILED FEB.16. 1917,

Patented Oct. 12, 1920.

4 SHEETS-SHEET 1.

BY i CO' HTTY/ L. WEBSTER.

FUEL SAVER AND SMOKE CONSUMER.

APPLICATION FILED FEB. I6. |917,

1,355,370. Patented oct. 12,1920.

4 SHEETS-SHEET 2.

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FUEL SAVER AND SMOKE CONSUMER.

APPLICATION FILED FEB. I6, 19171 1,355,370. Pawd 001;. 12,1920

4 SHEETS-SHEET 3.

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Paten'd Oct. 12, 1920'.

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1. L. WEBSTER'.

APPLICATION FILED FEB. I6, l917.

FUEL SAVER AND SMOKE CONSUMER.

UNITED STATES' PATENT QFFICE.

JOHN LINDSAY WnBsTnia, or OTT/awa, ONTARIO, CANADA.

FUEL-SAVER AND SM@KE-CGNSUlVlhl..v

Application filed February 16, 1917. Serial No. 149,036.

To all whom it 17mg/ concern Be it known that l, JOI-TN LrNDsAY lVnnsTnn, a subjectof the King of Great Britain, and residing at the city of Cttawa, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Fuel-Savers and Smoke-Consumers, of which the following is a specification.

This invention relates to improvements in fuel savers and smoke consumers and the objects of the invention are to increase the efficiency by introducing heated air into the boiler furnace both above and below the grate thereof and simultaneously to intermiX the flue gases with the required quantity of heated air, to permit of after burning taking place thereby effecting the complete combustion of the fuel.

Further objects are to readily control the stream of air delivered to the furnace and flues and generally to adapt the several parts of the boiler setting to better perform the functions required of them.

With these' and other objects in view the invention consists essentially of the improved construction particularly described and set forth in the following specification and accompanying drawings forming part of the same. f

In the drawings, r

Figure 1 is a longitudinal section of an embodiment of the present invention.

Fig. 2 is a transverse secton on the line 22 of Fig. 1.

Fig. 3 is a transverse section on the line 3-3 of Fig. 1.

Fig. 4 is a sectional plan view on the line 4-4 of Fig. 2.

Fig. 5 is a fragmentary perspective view of the bridge wall and side wall of the furnace showing the location of the several air passageways and the manner in which they communicate with the chamber in the bridge wall.

Fig. 6 is a front elevation of 'a boiler setting showing the vperforated front plates through which the air enters.

Fig. 7 is a longitudinal section of an alternative form of the invention.

Like characters of reference refer to like parts in the several figures.

Referring to the drawings, A represents a boiler of any usual description provided with a plurality of tubes 10 extending therethrough, the said boiler being supported by the hangers 11 suspended from the transversely extending I-beams 12carried by the y side walls 18 of the masonry inclosing the boiler.

Chambers 14 and 15 are provided at the front and rear ends of the boiler A, the latter communicating with a smoke stack and being separated from the combustion chamber 16 by the wall 17 which engages with the rear end of the boiler.

The combustion chamber 16 communicates with the furnace B but is separated therefrom by the bridge wall C having a compartment or chamber 18 therein filled with checker brick work which provides a baiiiing means and exposes an enlarged heating area to the air which is caused to pass through the said chamber in a manner to be made clear hereafter.

The furnace B is locatedv centrally below the boiler A at the forward end thereof but the grate does not extend ythe full width of the space below the boiler, ythe side walls 19 of the furnace being spaced from kthe yside walls 13 of the masonry to formflues 20 throughl which the gases from the furnace are designed to pass.

The front ends of open into the combustion chamber 16 so that the products of combustion after leaving the furnace B pass by way of the combustion chamber 16 into the fiues 20, from whence they are delivered to the chamber 14 and after passing through the tubes 10 into the chamber 15 are delivered to the smoke stack.

The side walls 19 of the furnace are provided with longitudinally7 extending conduits 21 which are located below the grate of the furnace Band are provided with a plurality of discharge orifies 22 through which air is delivered into theash-pit D, which is of the closed type.4

The rear ends of the conduits 21 communicate through the opening 6 ywith the chamber` 18 in the bridgewall which further communicates by means of the conduit 9 with the air passageway 23 extending through the crest of the side walls v19 of the furnace, the said passageways being provided with a d `plurality of discharge orifices 24,'which deliver hot air into the furnace B;

Conduite 25 extend longitudinally of the side walls 13 and communicate through the lpassageway 26 (shown in Fig. 4) with the chamber 18 inthe bridge wall, the said conthe flues 20 communi- 'cate with the chamber 14, while the rearends duits being provided with a plurality of discharge orifices 27 through which heated air is delivered into the flues 2O to intermix with the gases passing therethrough.

`Air is delivered to the chamber 18 in the bridge wall C through the inlet passages 2S which extend from the front of the boiler rearwardly below the fines 20 and communi `cate with the chamber L8 through the passageway 29Vshown in Fig. 4i, the stream of air delivered to the said inlet passages being controlled by a grid or grating 8 or other suitable valve means.

To facilitate cleaning doorways 30 and 31 are provided through which access to the chamber 15 and the combustion chamber 16 is obtained.

In Fig. 7 an alternative form of the in vention is set forth which only differs from that form already describedI in the provision of a heating` chamber E provided at the rear end of the brick work or masonry, the said chamber communicating through the passageway 32 with the chamber 18a in the bridge wall C1.

Air is supplied to the chamber E from the front of the masonry bypassing through the perforated front plate such as is shown in Fig. 6 into the passageway 28 which eX- tends rearwardly and discharges into the heating chamber E so that the air entering the passageway 28a is caused to flow for practically the whole length of the boiler rearwardly, where it is delivered into the passageway E and forwardly through the passage 32 into the chamber 18a in the bridge wall C1 from whence it is delivered to the air passageways or conduits 25, 21 and 23 as illustrated in Fig. 5.

ln the embodiment illustrated in Fig. 7 conduits 25 in the side walls 13 are connected by a transverse conduit 25a extending through the transverse walls 17, so that in this case a U-shaped passageway is provided and pre-heated air is delivered through the orifices 27 into the fines 20 and into the combustion chamber 16 on three sides of the said combustion chamber, namely on the sides and rear thereof, so that the products of combustion entering the chamber 16 will be ultimately mixed with heated air and thus the combustion of the fuel will be completed.

The assembly of the several parts of the structure will be readily understood from the foregoing description.

W'hen a boiler set in the above manner is in use, the valvemeans controlling the infiow of air through the passageways 28 is regulated and the air on its way through the said passageways becomes heated from the furnace walls 19 and flues 20.

This air passes through the passageway 29 into the chamber 18 in ill@ bridge wall C where it comes under the influence of the heating surfaceA of the checker brickwork filling the said chamber, and the heated air is now delivered through the opening 6, passageway 26 and conduit 9 to the conduits and passageways 21, 25 and 23 as illustrated in Fig. 5, where it is delivered to the.

furnace below and above the grate thereof and also into the flues 20.

As the products of combustion pass through the furnace and over the bridge wall they intermix with the heated air delivered through the openings 2li in the passageway .23 into the said furnace and combustion chamber, so that a further burning of the products of combustion takes place with the generating of greater heat.

lWhen the furnace gases enter the combustion chamber 16 they are subdivided into two streams which are delivered to the iiues 2O where they are again intermixed with hot air issuing from the orifices 27 in the con duits 25, so completing the combustion and the products of combustion which now pass through the tubes 10 from the chamber 14 are at an extremely high temperature and are then delivered to the chamber 15 and thence to the uptake, and the said products of combustion on their passage rearwardly, forwardly, and then again rearwardly of the boiler, effectively heat the water in the boiler.

ln that forni of the invention illustrated in Fig. 7, the same action as that yalready described takes place, except that in this case the heated air is delivered to the chamber 16 on three sides thereof from the passageways 25, and also fromv the conduit 25a passing through the division walls 17 ,and by the use of the heating chamber E a larger volume of air is heated to the desired temperature, as the air is kept fora somewhat longer period in contact with the heated brick work or masonry in its setting in its passage through the passageway 28a, chamber E and passageway 32 before entering the compartment or chamber in the bridge wall C1.

The doors and other usual appliances on the front of the furnace have either been omitted or not described as they would only detract from the clearance in illustration and description of the.invention.

Vilhile in the embodiment illustrated the air is delivered to the inlet passageways 28 under a natural draft, it will be understood that a blower or steam jets may be utilized for inducing this fiow of air when such is found desirable or necessary.

lt will be readily seen that the air prior to discharging' into the furnace gases'is thoroughly heated by its passage through the .'severalconduits and chamber in the bridge 'wall and the Van' thus intermixed with the furnace gases will produce a secondary combustion and effect an economy in fuel and eliminate smoke.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention, within the scope of the claim, constructed without departing from the spirit or scope thereof, itis intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim as my invention is:

In a fuel saver, a boiler setting` including` sidewalls, furnace side walls spaced from the said side walls to form flues, a bridge wall extending transversely between the furnace side walls, a furnace in front of the bridge wall, a combustion chamber behind the bridge wall, a boiler forming a closure for the upper portion of the furnace andthe combustion chamber, means for closing the space between the boiler and the said side walls, a chamber in the bridge wall, air conduits in the furnace wall above and below a grate of thefurnace, the said conduits communicating with the chamber in the bridge Wall, conduits in the side walls communicating with the flue between the said walls and the furnace side walls, the said conduits communicating with the chamber in the bridge wall, air inlet conduits extending below the said fiues, the front ends of the conduits extending through the front of the setting, and the rear ends communicating with the chamber in the bridge wall, and damper means controlling the flow of air through the said air conduits.

In witness whereof I have hereunto set my hand.

JOHN LINDSAY WEBSTER. 

